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Attaching the hanging bracket
first
1
Remove the screws fastening hanging
bracket onto the indoor unit.
Screw
Hanging bracket
2
Loosen the bolts fastening hanging bracket
onto the indoor unit and remove the hanging
bracket.
Bolts for fastening the hanging
bracket (Loosen these bolts.)
3
Adjust the length of the two bolts for
fastening the hanging bracket, as shown
below.
7 to 12 mm
Indoor Unit
Adjust the length of the bolts for
fastening the hanging bracket.
4
Fasten the hanging bracket with the hanging
bolts and ensure that the bracket is level
from front to back and from side to side.
Hanging bolt
Hanging bracket fixing board
(locally procured)
Washer
N
Ceiling surface
(Accessory)
(inside dimension)
Double nut
(locally procured)
Front
M
o
d
l e
R
A
- V
N
SM40
867 to 874
17-EN
5
Attach the indoor unit onto the hanging
bracket and fasten it tight with the bolts and
screws.
Bolts for fastening the hanging bracket
(Fasten the bolts tight.)
Use bolts to fasten
the hanging bracket.
CAUTION
• The ceiling is not always level. Use the level
gauge to measure the level of the ceiling in the
width and depth directions. Adjust the bolts for
the hanging brackets so that the level error will
be within 5 mm.
• Do not lower the air discharge side and the side
opposite to the selected drain pipe withdraw.
(Unit : mm)
– 9 –
5
Drain piping
CAUTION
Following the Installation Manual, perform the drain piping work so that water is properly drained. Apply a heat
insulation so as not to cause a dew condensation.
Inappropriate piping work may result in water leakage in the room and wet furniture.
• Provide the indoor drain piping with proper heat insulation.
• Provide the area where the pipe connects to the indoor unit with proper heat insulation. Improper heat insulation
will cause condensation to form.
• The drain pipe must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up and down
(arched shape) or allow it to form traps. Doing so may cause abnormal sounds.
• Restrict the length of the traversing drain pipe to 20 meters or less. For a long pipe, provide support brackets at
intervals of 1.5 to 2 meters to prevent flapping.
• Install the collective piping as shown in the following figure.
• Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.
• Do not allow any force to be applied to the connection area with the drain pipe.
• A hard PVC pipe cannot be connected to the drain pipe connecting port of the indoor unit. Be absolutely sure to
use the flexible hose provided for the connections with the drain pipe connecting port.
• Adhesive agents cannot be used for the drain pipe connecting port (hard socket) of the indoor unit. Be absolutely
sure to secure the pipe using the hose bands provided. Use of an adhesive agent may damage the drain pipe
connecting port or cause water to leak.
1.5 m to 2 m
Support
bracket
(Collective
piping)
Heat
insulator
Downward slope
1/100 or more
Drain pipe
Attached drain hose
connecting port
(hard socket)
Attached
hose band
Attached hose band
Soft
Soft
VP 20 Polyvinyl
Adhesive
socket
socket
chloride pipe
agent
(locally procured)
prohibited
Pipe material, size and insulator
The following materials for piping work and insulating process are procured locally.
Pipe material
Hard vinyl chloride pipe VP20 (Nominal outer diameter Ø26 mm)
Insulator
Foamed polyethylene foam, thickness: 10 mm or more
As long as possible
(Approx. 10 cm)
Arched shape
Downward slope
Trap
1/100 or more
VP30
Incorrect
18-EN
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